Photo of John Williams
    • School of Engineering and Applied Science, Aston University

      B4 7ET Birmingham

      United Kingdom

    19942019
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    Research Output 1994 2019

    3D reconstruction of complex dielectric function of the glass during the femtosecond micro-fabrication

    Turchin, A. V., Dubov, M. & Williams, J. A., 2010, Advanced photonics and renewable energy. Optical Society of America, paper BWD7. (OSA technical digest).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    inverse scattering
    shot
    far fields
    distribution functions
    fabrication

    3D reconstruction of the complex dielectric function of glass during femtosecond laser micro-fabrication

    Turchin, A., Dubov, M. & Williams, J. A. R., Dec 2011, In : Optical and Quantum Electronics . 42, 14-15, p. 873-886 14 p.

    Research output: Contribution to journalArticle

    Microfabrication
    Ultrashort pulses
    Refractive index
    refractivity
    Born approximation

    Abnormal spectral evolution of fiber Bragg gratings in hydrogenated fibers

    Liu, Y., Williams, J. A. R., Zhang, L. & Bennion, I., 15 Apr 2002, In : Optics Letters. 27, 8, p. 586-588 3 p.

    Research output: Contribution to journalArticle

    Open Access
    File
    Bragg gratings
    gratings
    fibers
    shift
    wavelengths

    Accurate differential group delay measurement of narrowband fiber devices with immunity to environmental perturbation

    Lai, Y., Zhang, W., Williams, J. A. R., Sugden, K. & Bennion, I., 2002, 2002 IEEE/ILEOS annual meeting conference proceedings: the 15th annual meeting of the IEEE Lasers & Electro-Optics Society. IEEE, Vol. 2. p. 811-812 2 p. ThUl. (IEEE Lasers and Electro-Optics Society. Annual Meeting).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Group delay
    Fibers
    Phase shift
    Modulation
    Polarization

    All fibre multichannel flattop filter based on coherent fibre delay line structure

    Lai, Y., Zhang, W. & Williams, J. A. R., May 2002, In : Electronics letters. 38, 10, p. 473-475 3 p.

    Research output: Contribution to journalArticle

    Electric delay lines
    Fibers
    Transversal filters
    Light interference
    Birefringence

    All-fibre optical sensing system: Bragg grating sensor interrogated by a long-period grating

    Fallon, R. W., Zhang, L., Everall, L. A., Williams, J. A. R. & Bennion, I., Dec 1998, In : Measurement Science and Technology. 9, 12, p. 1969-1973 5 p.

    Research output: Contribution to journalArticle

    Long Period Grating
    Optical Sensing
    Bragg gratings
    Diffraction gratings
    Bragg Grating

    Analysis of frequency response of a microwave photonic filter using superstructured fiber Bragg grating

    Zhang, W., Williams, J. A. R. & Bennion, I., 1 Dec 2004, Conference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS. Vol. 1. p. 276-277 2 p.

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Fiber Bragg gratings
    Photonics
    Frequency response
    Microwaves
    Bandwidth

    Analysis of single and multiple, non-permanent, tunable, birefringent spectral holes in a fibre-Bragg grating stop-band produced via uniaxial pressure

    Michaille, L., McCall, M. W., Lai, Y. C. & Williams, J. A. R., Jul 2003, In : Optics Communications. 222, 1-6, p. 1-8 8 p.

    Research output: Contribution to journalArticle

    Fiber Bragg gratings
    Bragg gratings
    fibers
    Birefringence
    gratings

    A new method for microwave generation and data transmission using DFB laser based on fiber bragg gratings

    Leng, J. S., Lai, Y., Zhang, W. & Williams, J. A. R., Aug 2006, In : IEEE Photonics Technology Letters. 18, 16, p. 1729-1731 3 p.

    Research output: Contribution to journalArticle

    Open Access
    File
    Microwave generation
    microwave transmission
    Distributed feedback lasers
    distributed feedback lasers
    data transmission

    A nonreciprocal wavelength-interleaving bidirectional coherent fiber transversal filter

    Lai, Y., Zhang, W., Williams, J. A. R. & Bennion, I., Dec 2003, The 5th Pacific Rim Conference on Lasers and Electro-Optics, 2003. CLEO/Pacific Rim 2003. IEEE, Vol. 1. p. 384 1 p. W4J-(8)-3

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Transversal filters
    Chromatic dispersion
    Birefringence
    filters
    Wavelength

    An optical fiber Bragg grating tactile sensor

    Cowie, B., Allsop, T. D. P., Williams, J., Webb, D., Bennion, I. & Fisher, M., May 2007, Optical sensing technology and applications. Baldini, F., Homola, J., Lieberman, R. A. & Miler, M. (eds.). Czech Republic: SPIE, 8 p. 65850I. (SPIE proceedings; vol. 6585).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Open Access
    File
    Fiber Bragg gratings
    Bragg gratings
    Optical fibers
    optical fibers
    Sensors

    An optical millimeter wave fiber laser

    Lai, Y., Zhang, W., Williams, J. A. R. & Bennion, I., Mar 2003, Optical Fiber Communications Conference, 2003. Sawchuk, A. A. (ed.). IEEE, Vol. 1. p. 238-239 2 p. paper TuL5. (Techincal digest).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Fiber lasers
    Millimeter waves
    Distributed feedback lasers
    Laser modes
    Linewidth

    An optical pump controlled tunable phase-shifted fiber grating transmission filter

    Lai, Y., Zhang, W., Zhang, L., Williams, J. A. R. & Bennion, I., Mar 2003, Optical Fiber Communications Conference, 2003. Sawchuk, A. A. (ed.). IEEE, Vol. 1. p. 35-37 3 p. paper MF32. (Techincal digest).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Pumps
    Fibers
    Wavelength
    Precipitation (meteorology)
    Cost effectiveness

    A novel all fiber microwave transversal filter with complementary outputs

    Lai, Y., Zhang, W. & Williams, J. A. R., 2002, 2002 International Topical Meeting on Microwave Photonics, MWP 2002 - Technical Digest. IEEE, p. 173-176 4 p. P2-1. (Techincal digest).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Transversal filters
    Microwave filters
    Fibers
    Electric delay lines
    Birefringence

    A novel dual complementary output optical fiber transversal filter for DWDM applications

    Lai, Y., Zhang, W., Williams, J. A. R. & Bennion, I., 2002, 2002 IEEE/ILEOS annual meeting conference proceedings: the 15th annual meeting of the IEEE Lasers & Electro-Optics Society. IEEE, Vol. 2. p. 659-660 2 p. ThEl. (IEEE Lasers and Electro-Optics Society. Annual Meeting).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Transversal filters
    Dense wavelength division multiplexing
    Optical fibers
    Fibers

    Apodised fibre Bragg grating design subject to length constraints

    Chisholm, K. E., Everall, L. A., Williams, J. A. R., Bennion, I., Liu, X., Rue, R. M. D. L. & Aitchison, J. S., Sep 1998, 24th European Conference on Optical Communication, 1998. IEEE, Vol. 1. p. 385-386 2 p.

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Fiber Bragg gratings
    Bandwidth
    Fabrication

    Application of superimposed grating structures for optimisation of fibre laser performance

    Lai, Y., Zhang, W., Williams, J. A. R. & Bennion, I., Oct 2003, Proceedings : Institute of Physics Meeting on In-Fibre Bragg Gratings and Special Fibres-Photonex Europe 2003. Institute of Physics

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Open Access
    Fiber Bragg gratings
    Bragg gratings
    Fabrication
    fabrication
    fibers

    Bend sensing by measuring the resonance splitting of long-period fiber gratings

    Liu, Y., Zhang, L., Williams, J. A. R. & Bennion, I., 15 Jun 2001, In : Optics Communications. 193, 1-6, p. 69-72 4 p.

    Research output: Contribution to journalArticle

    gratings
    fibers
    Fibers
    Compaction
    curvature

    Bidirectional nonreciprocal wavelength-interleaving coherent fiber transversal filter

    Lai, Y., Zhang, W. & Williams, J. A. R., Feb 2004, In : IEEE Photonics Technology Letters. 16, 2, p. 500-502 3 p.

    Research output: Contribution to journalArticle

    Open Access
    File
    Transversal filters
    Birefringence
    filters
    Wavelength
    fibers

    Bragg grating fast tunable filter for wavelength division multiplexing

    Iocco, A., Limberger, H. G., Salathe, R. P., Everall, L. A., Chisholm, K. E., Williams, J. A. R. & Bennion, I., Jul 1999, In : Journal of Lightwave Technology. 17, 7, p. 1217-1221 5 p.

    Research output: Contribution to journalArticle

    Bragg gratings
    tunable filters
    wavelength division multiplexing
    Wavelength division multiplexing
    Tuning

    Characteristics of linearly chirped and functionally apodised phase masks and reflection spectra of UV written fibre gratings

    Liu, X., Aitchison, J. S., Thoms, S., De La Rue, R. M., Williams, J. A. R., Everall, L. A. & Bennion, I., Sep 1998, Conference on Lasers and Electro-Optics Europe, 1998. 1998 CLEO/Europe. Glasgow: IEEE, p. 145 1 p.

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Chromatic dispersion effect in a microwave photonic filter using superstructured fiber Bragg grating and dispersive fiber

    Zhang, W., Bennion, I. & Williams, J. A. R., 22 Aug 2005, In : Optics Express. 13, 17, p. 6429-6437 9 p.

    Research output: Contribution to journalArticle

    Open Access
    File
    Bragg gratings
    photonics
    filters
    microwaves
    fibers

    Dark soliton sideband formation and stability in periodically amplifed systems

    Allen, K. M., Smith, N. J., Doran, N. J. & Williams, J. A., 15 Dec 1994, In : Optics Letters. 19, 24, p. 2086-2088 3 p.

    Research output: Contribution to journalArticle

    sidebands
    solitary waves
    laser cavities
    four-wave mixing
    amplifiers
    Birefringence
    Fiber optics
    birefringence
    fiber optics
    gratings

    Direct cavity assessment and mode optimisation technique for DFB fibre laser

    Lai, Y., Zhang, W. & Williams, J. A. R., 16 Oct 2003, In : Electronics letters. 39, 21, p. 1518-1519 2 p.

    Research output: Contribution to journalArticle

    Distributed feedback lasers
    Laser resonators
    Fiber lasers
    Laser modes
    Pumps

    Direct real-time cavity mode assessment and optimization technique for fiber lasers

    Lai, Y., Zhang, W., Williams, J. A. R. & Bennion, I., Feb 2004, In : IEEE Photonics Technology Letters. 16, 2, p. 413-415 3 p.

    Research output: Contribution to journalArticle

    Open Access
    File
    Laser resonators
    Fiber lasers
    Laser modes
    fiber lasers
    Stabilization

    Distributed temperature measurement using a Fabry-Perot effect based chirped fiber Bragg grating

    Won, P. C., Lai, Y., Zhang, W., Leng, J. S. & Williams, J. A. R., 15 Sep 2006, In : Optics Communications. 265, 2, p. 494-499 6 p.

    Research output: Contribution to journalArticle

    Fiber Bragg gratings
    Temperature measurement
    Bragg gratings
    temperature measurement
    gratings

    Distributed temperature sensing based on a chirped fibre Bragg grating

    Won, P. C., Leng, J., Lai, Y. & Williams, J. A. R., Oct 2003, Proceedings : Institute of Physics Meeting on In-Fibre Bragg Gratings and Special Fibres-Photonex Europe 2003. Institute of Physics

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Distributed temperature sensing using a chirped fibre Bragg grating

    Won, P. C., Leng, J., Lai, Y. & Williams, J. A. R., Jul 2004, In : Measurement Science and Technology. 15, 8, p. 1501-1505 5 p.

    Research output: Contribution to journalArticle

    Fiber Grating
    Fiber Bragg gratings
    Bragg Grating
    Bragg gratings
    Sensing

    Electron beam lithography of phase mask gratings for near field holographic production of optical fibre gratings

    Liu, X., Aitchison, J. S., De La Rue, R. M., Thoms, S., Zhang, L., Williams, J. A. R. & Bennion, I., Feb 1997, In : Microelectronic Engineering. 35, 1-4, p. 345-348 4 p.

    Research output: Contribution to journalArticle

    Electron beam lithography
    Optical fibers
    Masks
    near fields
    masks

    Evaluation of impact of beam size on fibre Bragg grating fabrication

    Gbadebo, A., Turitsyna, E. & Williams, J., 2014, Bragg Gratings, Photosensitivity, and Poling in Glass Waveguides 2014. Optical Society of America, paper BW1D.5

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Open Access
    File
    Bragg gratings
    gratings
    fabrication
    fibers
    evaluation

    Evaluation of Impact of Beam Size on Fibre Bragg Grating Fabrication

    Gbadebo, A. A., Williams, J. A. & Turitsyna, E., 27 Jul 2014, Bragg Gratings, Photosensitivity, and Poling in Glass Waveguides 2014. Optical Society of America, BW1D.5

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    chirp
    visibility
    Bragg gratings
    fabrication
    fibers

    Evaluation of RF power degradation in microwave photonic systems employing uniform period fibre Bragg gratings

    Yu, G., Zhang, W. & Williams, J. A. R., 15 Apr 2000, In : Optics Communications. 177, 1-6, p. 271-275 5 p.

    Research output: Contribution to journalArticle

    Open Access
    File
    Fiber Bragg gratings
    Photonics
    Bragg gratings
    radio frequencies
    Microwaves

    Experimental comparison of differing design approaches for multichannel fibre Bragg gratings

    Gbadebo, A. A., Turitsyna, E. G. & Williams, J. A. R., 2015, The European Conference on Lasers and Electro-Optics 2015. Optical Society of America, paper CE_1_4

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Experimental demonstration of real-time correction of writing errors during fibre-Bragg grating fabrication

    Gbadebo, A., Turitsyna, E. & Williams, J., 8 Sep 2016, Photonics and Fiber Technology 2016 (ACOFT, BGPP, NP). Optical Society of America, BTh1B.2

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Fiber Bragg gratings
    Demonstrations
    Fabrication
    Processing

    Fabrication and characterization of bandpass filters based on concatenated chirped fiber gratings

    Sugden, K., Zhang, L., Williams, J. A. R., Fallon, R. W., Everall, L. A., Chisholm, K. E. & Bennion, I., Aug 1997, In : Journal of Lightwave Technology. 15, 8, p. 1424-1432 9 p.

    Research output: Contribution to journalArticle

    Bandpass filters
    bandpass filters
    Germanium
    germanium
    gratings

    Fabrication of highly efficient grating band-pass filters and their applications in soliton propagation system

    Zhang, L., Harper, P., Sugden, K., Williams, J. R., Knox, F. M., Kean, P. N., Bennion, I. & Doran, N., 20 Sep 1996, The International Society for Optical Engineering. Chan, K. T., Jian, S. & Tong, F. F. (eds.). SPIE, p. 432-440 9 p. (SPIE proceedings; vol. 2893).

    Research output: Chapter in Book/Report/Conference proceedingOther chapter contribution

    Open Access
    File
    bandpass filters
    solitary waves
    gratings
    rejection
    fabrication

    Fabrication of multipassband moiré resonators in fibers by the dual-phase-mask exposure method

    Everall, L. A., Sugden, K., Williams, J. A. R., Bennion, I., Liu, X., Aitchison, J. S., Thoms, S. & De La Rue, R. M., Oct 1997, In : Optics Letters. 22, 19, p. 1473-1475 3 p.

    Research output: Contribution to journalArticle

    masks
    resonators
    filters
    fabrication
    fibers
    Open Access
    File
    Bragg gratings
    line spectra
    telecommunication
    retarding
    filters

    Fast wavelength switching of semiconductor laser pulses by self-seeding

    Huhse, D., Schell, M., Utz, W., Bimberg, D., Williams, J. A. R., Zhang, L. & Bennion, I., 30 Sep 1996, In : Applied Physics Letters. 69, 14, p. 2018-2020 3 p.

    Research output: Contribution to journalArticle

    inoculation
    semiconductor lasers
    pulses
    wavelengths
    tunable lasers

    Fiber Bragg grating fabrication for dispersion slope compensation

    Williams, J. A. R., Everall, L. A., Bennion, I. & Doran, N., Sep 1996, In : IEEE Photonics Technology Letters. 8, 9, p. 1187-1189 3 p.

    Research output: Contribution to journalArticle

    Fiber Bragg gratings
    Bragg gratings
    slopes
    Fabrication
    fabrication

    Fiber Bragg-grating true time-delay systems: discrete-grating array 3-bit delay lines and chirped grating 6-bit delay lines

    Molony, A., Zhang, L., Williams, J. A. R., Bennion, I., Edge, C. & Fells, J., Dec 1997, In : IEEE Transactions on Microwave Theory and Techniques. 45, 8 PART 2, p. 1527-1530 4 p.

    Research output: Contribution to journalArticle

    Bragg gratings
    Diffraction gratings
    Electric delay lines
    delay lines
    Fiber Bragg gratings

    Fibre Bragg grating time delay control of phased array antennae

    Molony, A., Zhang, L., Williams, J. A. R., Bennion, I., Edge, C. & Fells, J., May 1996, In : Journal of Modern Optics. 43, 5, p. 1017-1024 8 p.

    Research output: Contribution to journalArticle

    phased arrays
    delay lines
    Bragg gratings
    time lag
    antennas

    Fibre dispersion compensation using a chirped in-fibre Bragg grating

    Williams, J. A. R., Bennion, I., Sugden, K. & Doran, N. J., 9 Jun 1994, In : Electronics letters. 30, 12, p. 985-987 3 p.

    Research output: Contribution to journalArticle

    Dispersion compensation
    Bragg gratings
    Group delay
    Fiber Bragg gratings
    Single mode fibers

    Fibre Grating Based Optical Recirculating Filter with Optimised Filter Response

    Zhang, W. & Williams, J. A. R., Oct 2000, In : Fiber and Integrated Optics. 19, 4, p. 455-467 13 p.

    Research output: Contribution to journalArticle

    Wave filters
    Optical filters
    optical filters
    gratings
    filters

    Fibre grating DFB laser for generation of optical microwave signal

    Zhang, W., Lai, Y. C., Williams, J. A. R., Lu, C., Zhang, L. & Bennion, I., Jul 2000, In : Optics and Laser Technology. 32, 5, p. 369-371 3 p.

    Research output: Contribution to journalArticle

    Distributed feedback lasers
    Microwaves
    gratings
    microwaves
    fibers

    Fibre grating filters for suppression of near infrared OH emission lines

    Gbadebo, A., Turitsyna, E., Shu, X., Williams, J. & Turitsyn, S., 2013, 39th European Conference and exhibition on Optical Communication (ECOC 2013). Red Hook, NY (US): IET, p. 852-854 3 p. (IET conference publications; vol. 622).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Notch filters
    Fiber Bragg gratings
    Optical fibers
    Masks
    Infrared radiation

    Fibre optic bandpass transversal filter employing fibre grating arrays

    Zhang, W. & Williams, J. A. R., 10 Jun 1999, In : Electronics letters. 35, 12, p. 1010-1011 2 p.

    Research output: Contribution to journalArticle

    Transversal filters
    Bandpass filters
    Fiber optics
    Frequency response
    Fibers

    Fibre optic radio frequency notch filter with linear and continuous tuning by using a chirped fibre grating

    Zhang, W., Williams, J. A. R., Everall, L. A. & Bennion, I., 3 Sep 1998, In : Electronics letters. 34, 18, p. 1770-1772 3 p.

    Research output: Contribution to journalArticle

    Notch filters
    Fiber optics
    Signal processing
    Tuning
    Fibers